Magnum and Higgins reexamine a fatal arson investigation at the request of TC and Mahina, leading to a sinister discovery. Kumu volunteers with Rick at a veterans' crisis call center.

Guy Fieri invites four chefs to break the world shopping speed record as they grab everything they'll need to make two complete meals in a single four-minute shop. To make things even more twisted, the chefs must grab a "must-use" red light special ingredient mid-shop. After the chefs cook a weeknight favorite, Guy insists they make an upscale dinner with what they have left, plus one more item from a designated aisle chosen at random. The winning chef will have an opportunity to speed shop Flavortown Market for up to $20,000.

Magnum and Higgins take a major step forward in their relationship. At the same time, the past comes back to haunt them when a previous suspect becomes their client. TC aims to scale up Island Hoppers. Rick gets a new business partner.

Camille's suspicions heighten. Damián, Cameron and Roi have a troubling encounter, shaking the entire gang's alibis. A loose end emerges in Paris.

Maya chases the car that's been following her. With the adults distracted, Claire's children investigate the mystery of their mother's old photo.

When a marine biologist dies while diving for gold from Judith and Jeremy's boat, Jean is called on to investigate.

Alan and his friends finally get the chance to embark on the epic challenge of battling the Post Office in court.

The ultimate reality game of detection, backstabbing and trust suddenly becomes very real as the Faithful discover who the Traitors' first murder victim is.

After a crushing loss, Laios, Marcille, and Chilchuck quickly reenter the dungeon to save Falin, but this time, they have a foolproof survival plan.